/** 
 * @file llnullcipher.cpp
 * @brief Implementation of a cipher which does not encrypt.
 *
 * $LicenseInfo:firstyear=2003&license=viewergpl$
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 * Copyright (c) 2003-2009, Linden Research, Inc.
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 * Second Life Viewer Source Code
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#include "linden_common.h"

#include "llnullcipher.h"

///----------------------------------------------------------------------------
/// Class LLNullCipher
///----------------------------------------------------------------------------

U32  LLNullCipher::encrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len)
{
	if((src_len == dst_len) && src && dst)
	{
		memmove(dst, src, src_len);
		return src_len;
	}
	return 0;
}

U32 LLNullCipher::decrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len)
{
	if((src_len == dst_len) && src && dst)
	{
		memmove(dst, src, src_len);
		return src_len;
	}
	return 0;
}

U32 LLNullCipher::requiredEncryptionSpace(U32 len) const
{
	return len;
}
